Having checked around, I couldn't find any references to a visit by Carius to the Tank Museum, at Bovington. Somehow, I can't imagine that he would have appeared in one of his favoured checked shirts, if he'd received an official invitation to visit the Museum.

Carius died, aged 92, in 2015. Had he visited Bovington when he was still pretty mobile, I'm sure they would have made a big deal of it. Here's the photo:

I've just managed to order a used copy of his highly rated 'Tigers in the Mud', from Amazon. I still find it truly amazing that such a modest, and slight looking, man could have survived five simultaneous bullet wounds, made a full recovery, and gone on to build a lasting reputation for courage under fire.
Here's a link to a short appreciation of his life:

It's at this website, where it's also possible to check up on other famous WW2 figures (even some real baddies. Carius remains untained, and held in great esteem, so far as I can tell)
https://ww2gravestone.com/people/carius-otto/